Skip to main content
All docs
V24.2

DevExpress v24.2 Update — Your Feedback Matters

Our What's New in v24.2 webpage includes product-specific surveys. Your response to our survey questions will help us measure product satisfaction for features released in this major update and help us refine our plans for our next major release.

Take the survey Not interested

DxRangeSelector.ValueChangeMode Property

Specifies how the Range Selector updates selected range values.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v24.2.dll

NuGet Package: DevExpress.Blazor

#Declaration

C#
[DefaultValue(RangeSelectorValueChangeMode.OnHandleRelease)]
[Parameter]
public RangeSelectorValueChangeMode ValueChangeMode { get; set; }

#Property Value

Type Default Description
RangeSelectorValueChangeMode OnHandleRelease

An enumeration value.

Available values:

Name Description
OnHandleRelease

The component updates selected range values once a user drops a slider handle.

OnHandleMove

The component updates selected range values whenever a user drags a slider handle.

#Remarks

The Range Selector updates values of the selected range when a user drops a slider handle. This behavior corresponds to the OnHandleRelease mode.

Set the ValueChangeMode property to OnHandleMove to update selected range values whenever a user drags a handle. To respond to value changes, handle the ValueChanged event.

The following code snippet sets the value change mode to OnHandleMove, obtains values of the current range in a ValueChanged event handler, and displays the number of selected days:

Range Selector - Value Change Mode

Razor
<span><b>@DaysCount days are selected</b></span>
<DxRangeSelector Width="1100px"
                 Height="200px"
                 SelectedRangeStartValue="@(new DateTime(2024, 2, 1))"
                 SelectedRangeEndValue="@(new DateTime(2024, 2, 14))"
                 ValueChanged="@OnValueChanged"
                 ValueChangeMode="RangeSelectorValueChangeMode.OnHandleMove">
    <DxRangeSelectorScale StartValue="@(new DateTime(2024, 1, 1))"
                          EndValue="@(new DateTime(2024, 6, 1))"
                          TickInterval="ChartAxisInterval.Week"
                          MinorTickInterval="ChartAxisInterval.Day"
                          MinRange="ChartAxisInterval.Week"
                          MaxRange="ChartAxisInterval.Month"
                          ValueType="ChartAxisDataType.DateTime">
        <DxRangeSelectorScaleMarker>
            <DxRangeSelectorScaleMarkerLabel>
                <DxTextFormatSettings Type="TextFormat.MonthAndYear" />
            </DxRangeSelectorScaleMarkerLabel>
        </DxRangeSelectorScaleMarker>
    </DxRangeSelectorScale>
    <DxRangeSelectorSliderMarker>
        <DxTextFormatSettings Type="TextFormat.MonthAndDay" />
    </DxRangeSelectorSliderMarker>
</DxRangeSelector>

@code {
    double DaysCount { get; set; } = 14;
    void OnValueChanged(RangeSelectorValueChangedEventArgs args) {
        var startDate = args.CurrentRange.FirstOrDefault() as DateTime?;
        var endDate = args.CurrentRange.LastOrDefault() as DateTime?;
        if (startDate != null && endDate != null)
            DaysCount = (endDate - startDate).Value.TotalDays;
    }
}
See Also